No.  Sleep walking is about doing things as if you were awake, but not remembering. things like walking, talking, changing rooms etc.. are part of sonambulism or sleep walking.  Taking off your clothes at night is usually because you were hot or is sleep activity like kicking off the blankets.  She was probably not in deep sleep cycle at the time or just before waking.

Wayne Yankus, MD, FAAP
expert panelist: pediatrics